My game started out as being for iPhone only. It has since been updated to be a universal app for iPad as well. I have noticed though that when playing, it will not submit achievements or update scores. Even though the same exact code runs (no conditional compilation).
I blew it off at the time assuming that perhaps Game Center was down. I've just wrapped up development of a tvOS version of the game which shares the same app identifier. It works with Game Center as well, but the same issue happens; no achievements are being submitted and scores not updated. If I then play the game on my iPhone, it updates things as expected.
I looked in itunes.connect.com to see if there were any device-specific settings, but cannot find any.
Anyone else seeing this?